So after accepting an invitation to join Google+ I accepted and am now trying to marvel at its simpleness yet confusing ideas which do work.
I have quite a lot of contacts to join it as well so we will see what happens should they do that.. You can only join currently if you have a google email account (so I have read, but could be wrong) but from there it sits nicely along side gmail and the other bits google offers.
It links into Picassa for photos and so photo sharing is really easy. Adding friends is not difficult as you can put them in different circles and allow them to see what you want, however whilst sharing photos is easy, I am not sure yet what people can see so currently most of them are blocked.
If you want to have an invite then message me through here with your email details. Mashable.com and crossrider.com have some very useful information and ideas and tips and applications.
Why not try it, at least Cafe World, Farmville, Pet Society etc etc. are not part of G+ but then it might only be a matter of time...
Finally there is this button which seems to be cropping up everywhere you add it pretty much everywhere too.